Double-tree



(No Model.)

J. T. DOUGINB.

DOUBLE TREE.

No.310,801. Patented Jan. 13, 1885.

Parana* lirica.

4JAMES T. DOUGINE, OF CHICAGO, ILLINOIS.

DOUBLE-TREE.

SPECIFICATION forming part of Letters Patent No. 310,801, dated January 13,1885.

Application filed April 16, 1884. (No model.)

To @ZZ whom it may concern-.-

Be it known that l, JAMES T. DOUGINE, a citizen of the United States, residing in Chicago, in the county ot' Cook and State of Illinois, have invented a new and useful Improvement in Double-Trees, of which the following is a specification.

My invention relates to improvements in double-trees; and it consists in connecting the single-trees to the double tree at `each end thereof by means of springs for the purpose of relieving the horses shoulders against sudden jerks or shocks.

My invention also consists in making the clevis, clip, or attachment to the double-tree integral with or rigidly connected to one of the stems or pull-rods of a coil compressionspring, so that the pull-rod cannot turn or swivel on the clevis, the other pull-rod, which is attached to the singletree, being arranged not to turn or swivel on the former, whereby the single-tree hook is held with its point in a vertical position in order to prevent casual disengagement of the single-tree.

It also consists in providing the pull-rod, which is attached to the double-tree, with an eye for the stay-chain hook.

In the accompanying drawings, which form a part of this specification, and in which similar letters of referenceindicate like parts, Figure 1 is a plan view of a double-tree embodying my invention. Fig. 2 is an enlarged detail plan view of the' spring-connection, and Fig. 3 is a central longitudinal section of the same.

In the drawings, A represents a tongue, B a double-tree, C the single-trees, and D springs connecting the double-tree to the single-trees. These springs are preferably coil compression-springs. One ofthe pull-rods, d, is provided with a hook, d, to engage with the staple or eye c of the single-tree, and is secured at its other end by screw-threads to theeap or plate d2, which fits against the end of the spring. The other pull-rod or draw-bar, di, is made in two branches, which it inside the spring and astride the rod d, each of said branches being secured by suitable nuts, di, or otherwise to the cap or plate d5, which bears against the opposite end of the spring. The pull-rod d3 is provided at its end with asocket, clip, or attachment, d, by which it is secured to the end of the doubletree. This clip or attachment d6 is preferably made in the form of an open-ended socket adapted to surround or embrace the end of the double-tree, the open end of the socket thus permitting the sides of the same to be clamped down tight upon the doubletree. The cap or plate d2 is provided with openings for the two branches of the draw-bar di, and said cap slides on the same as a guide, while the cap d5, having a central opening, slides on the draw bar or rod d. The branches of the rod d3 also prevent the cap d from swiveling or turning, so that the hook d of the rod d may be kept turned np, and thus prevent the single-tree from becoming disengaged with said hook.

I am aware that traces have heretofore been provided with springs, as well as that the double-tree has been secured to the tongue by a spring-connection, and I disclaim such devices as forming no part of my invention. di is the eye for the stay-chain E.

l. The combination of double-tree B with single-tree C, coil compression-spring D, caps cl2 an d di", and pull-rods d and d3, said pull-rod d being provided with a hook for attachment to the single-tree, and said pull-rod di having two branches sliding in said cap d2, and being provided with open-end socket d6, for attachment to the double tree, substantially as speeiiied.

2. The combination of double-tree B with single-tree C, coil compression-spring D, cap d5, pull-rod d3, provided with two branches secured to said cap, and having clip d6 secured to the double-tree and stay-chain eye di, cap (Z2, and pull-rod d, provided with hook d for the single-tree, substantially as speciiied.

JAMES T. DOUGIN E. 

